<div class="row" >
    <hr style="margin:30px 0;border: none"/>
    <div class="col-md-8 col-md-offset-2" style="border-radius:8px;padding:30px 40px;background-color: #fff">
        <div class="progress" >
            <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;">
                <span class="sr-only">60% Complete</span>
            </div>
        </div>
        <hr style="margin:10px 0;border: none"/>
        <div class=" row" style="padding: 0 50px">
            <div class="col-md-12">
        <h4>题目</h4>
        <ul class="list">
            <li>选项1</li>
            <li>选项1</li>
            <li>选项1</li>
            <li>选项1</li>
        </ul>
        </div>
        </div>
        <hr style="margin:30px 0;border: none"/>
        <div class=" row text-center alert" style="background-color: #6cabc9">
            <div class="col-md-2 col-xs-6">
            <button class="btn btn-info" style="background-color:#6a8a99">上一题</button>
            </div>
            <div class="col-md-2 col-md-offset-8 col-xs-6">
            <button class="btn btn-primary" >下一题</button>
            </div>
        </div>
    </div>
</div>